package com.work.blog.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.work.blog.model.Result;
import lombok.SneakyThrows;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:DELL
 * Date:2025-06-16
 * Time:16:20
 */
//统一结果返回
@ControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {
    @Autowired//注入依赖
    private ObjectMapper objectMapper;
    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;//都执行返回
    }

    @SneakyThrows
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof Result){//对已经存在的result进行处理
            return body;
        }
        if (body instanceof String){//对String进行特殊处理
            return objectMapper.writeValueAsString(Result.success(body));
        }
        return Result.success(body);//对结果进行处理
    }
}
